Are protocols inheritable in Objective-C?
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Published on 2010-06-04T06:01:40Z
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I saw this in some header file in the framework directory:
@interface NSCharacterSet : NSObject <NSCopying, NSMutableCopying, NSCoding>
@end
@interface NSMutableCharacterSet : NSCharacterSet <NSCopying, NSMutableCopying>
@end
I thought protocols were inheritable.If I am right about that,There is no need to type <NSCopying, NSMutableCopying>
again after "NSMutableCharacterSet : NSCharacterSet
".And NSMutableCharacterSet also conforms to NSCoding protocol, right?
Than why is Apple typing that again?Am I making mistake?
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